drm/i915: abstract virtual PCH id detection

Make the code slightly more pleasant to look at. No functional changes.

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/38ee1ac06c6724e888679eb287af36c221bd399b.1517851783.git.jani.nikula@intel.com

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 066c340..786486a 100644 (file)
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -192,6 +192,16 @@ intel_pch_type(const struct drm_i915_private *dev_priv, unsigned short id)
        }
 }
 
+static bool intel_is_virt_pch(unsigned short id,
+                             unsigned short svendor, unsigned short sdevice)
+{
+       return (id == INTEL_PCH_P2X_DEVICE_ID_TYPE ||
+               id == INTEL_PCH_P3X_DEVICE_ID_TYPE ||
+               (id == INTEL_PCH_QEMU_DEVICE_ID_TYPE &&
+                svendor == PCI_SUBVENDOR_ID_REDHAT_QUMRANET &&
+                sdevice == PCI_SUBDEVICE_ID_QEMU));
+}
+
 static enum intel_pch intel_virt_detect_pch(struct drm_i915_private *dev_priv)
 {
        enum intel_pch ret = PCH_NOP;
@@ -264,13 +274,8 @@ static void intel_detect_pch(struct drm_i915_private *dev_priv)
                pch_type = intel_pch_type(dev_priv, id);
                if (pch_type != PCH_NONE) {
                        dev_priv->pch_type = pch_type;
-               } else if (id == INTEL_PCH_P2X_DEVICE_ID_TYPE ||
-                          id == INTEL_PCH_P3X_DEVICE_ID_TYPE ||
-                          (id == INTEL_PCH_QEMU_DEVICE_ID_TYPE &&
-                           pch->subsystem_vendor ==
-                           PCI_SUBVENDOR_ID_REDHAT_QUMRANET &&
-                           pch->subsystem_device ==
-                           PCI_SUBDEVICE_ID_QEMU)) {
+               } else if (intel_is_virt_pch(id, pch->subsystem_vendor,
+                                            pch->subsystem_device)) {
                        dev_priv->pch_type = intel_virt_detect_pch(dev_priv);
                } else {
                        continue;